https://www.slashgear.com/2031582/forgotten-chrysler-ball-stud-hemi-never-made-to-production/
This Forgotten Chrysler HEMI Never Made It To Production
Nov 24, 2025 - Chrylser made several prototypes of its revolutionary small and lightweight Ball-Stud HEMI engine, but only one is known to survive to this day.
hemi neverforgottenchrysler
https://www.jalopnik.com/2032580/why-chrysler-ball-stud-hemi-never-stood-a-chance/
Why Chrysler's Secret Ball-Stud Hemi Never Stood A Chance
Nov 27, 2025 - The Ball-Stud Hemi featured 2.25-inch intake and 1.94-inch exhaust valves like the 426, but weighed 100 pounds less and was 6.5 inches narrower.
hemi neverchryslersecretball